I am a electrical contractor. Let me know if I can help you with any questions. I bought led tape lights off amazon but never got around to hooking them up in my sprinter. Super easy tho. It's two wires. Just tap off existing lights. Or find constant 12 volts and add a switch. Any switch will do as long as it's rated for the amps but leds dont draw much so mostly any switch will do.I had posted this in another thread that had cargo lighting discussion. I'm looking into the tape on led's. Come to find out, I know an electrician who has done this in his sprinter and I am going to pick his brain about it.